Be careful not to disengage the rotor, drive link or coupling shaft while aligning bolt holes as
this could affect the timing.
The meshing of the precise rotor (18) teeth with the precise drive link (23) spline valleys is
absolutely crucial to a correctly timed and functional motor. Misalignment by one spline
tooth will be indicated by the timing mark on the coupling shaft (25) being radially 45° from
the specified rotor lobe.
Locate on the rotor (18) the only two spline teeth, 1800 apart, that are diametrically aligned (on the same center
line) with two rotor lobes. Take the rotor set (16), seal ring (21) and wearplate (20) as a unit and align these two
just located rotor spline teeth to mesh with the two drive link (23) spline valleys that are diametrically aligned with
the timing mark on the coupling shaft (25) and install this unit onto the housing (28) with the wearplate against
the housing. With the rotor set (16) now correctly in mesh with the drive link, rotate the rotor set (16), wearplate
(20), drive link (23) and coupling shaft (25) to align the stator (19) and wearplate bolt holes with the bolt holes in
Install drive link spacer/washer (22) into the rotor spline cavity onto the end of the drive link (23).
Apply a small amount of clean grease to a seal ring (15) and insert the seal ring into the end cover (14) seal ring
groove. Install end cover assembly onto the rotor set (16) with seal ring (15) against the stator (19) and align the
end cover bolt holes with the stator bolt holes.
Install seven bolts (13) into the assembly bolt holes finger tight, then torque the bolts to 22-26 ft.-lbs. Refer to
tightening sequence, figure 4-22B.
Position assembled motor (10), ports facing down, and inner guard half (11) to mounting bracket and install
screws (8) and lockwashers (9).
Install key (12) in motor shaft and push pulley (7) onto shaft and key. Place belt (6) around pulley (7) and pulley
on injection pump (5). Slide the pump (5) on mounting studs to pull belt (6) tight and tighten nuts (4).
Install the outer guard half (3) and secure with screws (1) and lockwashers (2). Attach hydraulic hoses to motor
4-9 MAINTENANCE OF DRAWWORKS.
4-9.1 Bevel Gear Box Assembly. (Figure 4-23).
4-9.1.1 Removal and Disassembly.
Disconnect and remove chain (1). Disconnect driveshaft from flange (2).
Remove nuts (3), lockwashers (4), bolts (5) and shims (6). Attach a hoisting device to the gear box assembly (7)
and lift it from the unit.
Loosen setscrew (8) and remove sprocket (9). Remove key (10).